Mechanical Strength of Mild Steel

Mechanical Strength of Mild Steel Introduction CE 2.1 One day on National Geographic channel I was watching a program in which they were experimenting with the finite element analysis software to observe structure and thermal load effects on the wing of Boeing 747s wing. Luckily, during the same time, in my 8th semester back in 2013 we were taught the introduction to Finite Element Methods by our professor, Dr. Ijaz Ahmed Chaudhary in University of Engineering and Technology, Lahore. The curiosity in that subject laid the initial foundations of my interesting project named as Drop Test Calculations for Mild Steel where I worked as a Team Leader. This experience paved my way to two more leadership roles. Background CE 2.2 It was almost four years in UET Lahore. And being a student of engineering I almost had the fundamental knowledge of the field by that point. I wanted to use my theoretical knowledge in some practical way. I had already studied the mechanics of materials 1 and 2. And performed various experiments in lab to find out the material properties such as; ductility, malleability, brittleness and toughness. In 8th semester ANSYS was being used as external load analysis software in Finite Element Analysis course. I was assigned a project to select a topic and perform it in the lab and as well as analyze it using ANSYS. That was a good opportunity to gain practical experience and integrate the knowledge of Mechanics of Materials and Finite Element Analysis. Nature of Project: CE 2.3 This project included the calculation for drop testing of mild steel. In industry and real world different items and object face different kind of environmental conditions. Drop testing was used for shock loading effects. First of all, theoretical modeling was done for drop table to check either items can survive shock or not. Then commercial finite element software was used to investigate the response of drop table. Objective of the Project: CE 2.4 The objective of the report was to determine mechanical strength of mild steel. I had to use drop testing method then I investigated its behavior on finite element software. Nature of My Particular Work Area CE 2.5 In this project, I had to perform calculations for drop table by taking it as a fixed beam at both ends and applying a sinusoidal shock load of 100 gram. Then calculations were made to calculate the maximum binding stress produced in drop table. CE 2.6 Organizational Structure CE 2.7 Statement of Duties Being leader of the group my scope of duties included: To plan the project for timely completion. To make work packs to ensure health and safety. Conduct meeting with members and supervisor for mutual feedback. Theoretical calculation of drop test mechanism on mild steel. Report writing and technical presentation. Personal Engineering Activity CE 2.8 I started with literature review about drop testing and FEA on internet and library. Subsequent discussions with my professor led me up to kick off my calculations. The second step of course was to select certain parameters and their dimensions for drop testing. These parameters are given in the table below. The drop table material and the shock load value was assigned to us by our professor. I chose the dimensions of the table and mass of test item carefully. If the mass of the table is too less it wont be able to bear the shock itself let alone the test item. To make things more clear, test item is always on the top of table when shock is being applied on it. Now the next step was to calculate the weight of the table.Table thickness = d = 0.0125mTable length = l = 0.3mTable width = b = 0.3m Weight of the table =W1 = density * volume*gW1 = 86.75 NWeight of the test item = W2= 20KG = 196 NTotal Weight = W = W1+W2 = 282.75 N Moment of Inertia = I = 4.88 * 10-8 m-4 The rest of the calculations are shown belowTo calculate shock factor, F, I needed to calculate . Shock duration, , is 0.01 s and the natural time period, , is given as below: Where ,, is the static deflection and is calculated as follows: Where, W = Weight per unit length, N/m = E = Youngs modulus of Elasticity of Mild Steel = 210 x 109 N/m2 So, after substituting the values in the above equation Hence, As a result, CE 2.9 By using the graph below in Figure 1, we deduce that F factor comes out to be 1.2. Figure 1: Calculation of Factor F Moreover, some of the basic calculations are done below: Dynamic load is calculated as Pd = F * M * AA= Applied Shock = 100gM= Total Weight/gravitational force (g) Therefore , Pd = 33930 Newton Now, I have to calculate maximum bending stress Max Bending Stress =(Bending Moment * Distance from axis)/ Inertia Max Bending Stress = 48.88 MPa I verified the bending moment calculations as they were performed by my team mate and it is beyond the scope of this report to discuss it fully here. CE 2.9 According to the principle of mechanics, if the maximum bending stress produced by the applied load is less than the ultimate tensile strength of the material then the material can withstand the applied load without failure and vice versa. In this case, since the ultimate tensile strength of mild steel is 165 MPa which is greater than the maximum bending stress of 48.88 MPa produced by the applied load, drop table will easily sustain the 100 g shock loading. CE 2.10 Computational dynamics came into play in the form of FEA as I used ANSYS to simulate static deflection of the drop table subjected to 100 g shock loading. The load is applied on the top surface of drop table in form of pressure and both ends of the table are fixed by using fixed support. Material properties used for the drop table are shown in the figure 2 below. Figure 2: Material properties of the test piece CE 2.11 I still remember that there came a point where my team was very much stressed out because of the criticality of the extensive calculations involved. In fact, my team failed in couple of iterative processes and they wanted to give up on this project. I summoned a meeting where I emphasized on the fact that every failure is itself a step towards success. By omitting those factors which are causing us disappointment should be identified and removed. My team appreciated the gesture and went on to complete the project with more enthusiasm and that is when we finally got the 3D mesh of the work piece as shown below in figure 3: Figure 3: 3D meshing of the drop table The parameters for meshing details are show in figure 4 below. Figure 4: Meshing parameters obtained during FEA CE 2.11 After the meshing, the sinusoidal shock load of 100 g, shown in figure below, depicts that the maximum Von Mises stress produced in drop table amounts to be 50.23 MPa. Our theoretical calculated maximum stress comes out to be 48.88 MPa. Again, I can surely say that this stress is within the bearable load limits of the table load and hence wont fracture. The stress patterns are shown in figure 5 below. Figure 5: Static structural analysis of drop table CE 2.12 Mild steel is a very stiff material so a very high shock wave is generated when drop table hits the mild steel. On the other hand, due to its stiffness the duration of the shock is very low. In case of mild steel peak shock value calculated was 55.84 g when a drop table is dropped from a height of 330 m. Below figure 6 depicts this behavior in the form of a graph. Figure 6: Shock loading VS Time Graph CE 2.13 Von Mises stress contours produced when drop table strikes with mild steel attached sensors are shown in the figure below. Stress contours clearly shows that high stresses are produced in region where drop table makes contact with the object. Highest stress produced is 49.9 MPa as shown in figure 7. Figure7: Von Mises stress contours produced in case of mild steel programmers contact CE 2.14 As we had to use Lab with heavy machinery and metal pieces, I made sure that every used proper safety procedure such as wearing PPE. Toolbox talks and near miss discussions were conducted before every session. That was the reason project was completed without any accidents. Summary CE 2.15 The timely completion of this project boosted up my technical knowledge and had an ever lasting impact on my people and time management skills. Later on, during one of my internships I realized that my quality check department was facing a material failure issue. Keeping in view this project I performed the drop testing and deduced that the material wasnt strong enough to resist the stresses and buckled in extreme loading conditions. My study was well praised and they switched from Steel to Aluminum and since then have got fewer failures.

Michelangelo Buonarroti, the greatest of the Italian Renaissance artists

Michelangelo Buonarroti, the greatest of the Italian Renaissance artists, was born on March 6, 1475, in the small village of Caprese (Today, Caprese is known as Caprese Michelangelo or Tuscany, Italy). Michelangelo grew up in Florence, Italy. His Father was a government administrator and his Mother died when he was only six years old. After the death of his mother Michelangelo lived with a stone cutter and his family in the town of Settignano, where his father owned a marble quarry and small farm. Along with living with a stone cutter (where he learned to handle marble), Michelangelo's influences included da Vinci and Dominico Ghirlandaio. Michelangelo showed no interest in school, he preferred to copy paintings from churches and seek the company of painters. His artistic talents were noticed at a very early age. At the age of thirteen, Michelangelo was apprenticed to the painter Domenico Ghirlandaio. At age fourteen Michelangelo’s father persuaded Ghirlandaio to pay Michelangelo as an artist, which was unusual at the time. Demonstrating obvious talent, he was taken under the wing of Lorenzo de' Medici, the ruler of the Florentine republic and a great patron of the arts. For two years beginning in 1490, he lived in the Medici palace and attended the Humanist academy, where he was a student of the sculptor Bertoldo di Giovanni and studied the Medici art collection, which included ancient Roman statuary. At the academy, both Michelangelo’s outlook and his art was influenced by many of the most prominent philosophers and writers of the day. At this time Michelangelo sculpted the Madonna of the Steps (1490-1492) and Battle of the Centaurs (1491-1492). Lorenzo de Medici, the man who gave Michelangelo the tools and schooling to perfect his artistry, passed away in 1492. Michelangelo decided that it was time to return home to his family, but he continued studying on his own. Although the practice was forbidden at the time by the church, Michelangelo got special permission to study anatomy of the dead at a hospital in the church of Santo Spirito. He used his new knowledge of the human body to create some of his most famous works, including the famous statue of David (1501-1504), the sculptures in the Church of San Pietro, and the Creation of Adam on the Sistine Chapel’s ceiling, which there is a hypotheses that part of it is shaped like the human brain. Michelangelo’s love for sculpture continued to grow, and so did the attention of the world to his work. His demand as an artist grew, and he began creating some of the most famous works of his career. And then there is his architecture, where Michelangelo reordered ancient forms in an entirely new and dramatic ways. Michelangelo was principally a sculptor and always claimed that architecture was not his profession, but, with a sculptor's vision, he saw buildings as dynamic organisms – metaphors of the human body and he designed some of the most impressive architecture in all history. Among his best-known buildings are the Medici Chapel and the Laurentian Library in Florence and he finished the architectural work on St. Peter’s Basilica in Rome. Michelangelo renewed architectures potential for the next generation of architects, freeing them from the need to slavishly imitate models from the past and allowing them to arrive at their own forms of expression. Michelangelo, though best known for his sculpture, was also a poet. He composed over 300 pieces of poetry during his life time including the poem about the hardships of painting the Sistine Chapel ceiling. In his poems he discusses categories pertaining to love, death, evil and good, and beauty. His writing is similar to his art in that every word is carved into the realities of life. Michelangelo's art is his love of male beauty, which attracted him both by the nature of natural beauty and emotionally. Such feelings caused him great anguish, and he expressed the struggle between reality and desire for the male body in his sculpture and his poetry. The sculptor loved many youths, many of whom posed for him. His greatest love was Tommaso dei Cavalieri, who was 16 years old when Michelangelo met him in 1532, at the age of 57. Cavalieri was open to the older man's affection and Michelangelo dedicated many poems to him. Some say Michelangelo’s relationship with Cavalieri was only a deep friendship and not sexual. Even if Michelangelo had homo-erotic impulses, there is no evidence he acted on them. Cavalieri was not the only inspiration for Michelangelo’s poetry. Later in life he fell in love with Vittoria Colonna. She was a widow and friend to Michelangelo in his later maturity. Between Michelangelo and Vittoria Colonna a deep friendship developed, one might almost say an absolutely pure love, inspired by poetry and faith, out of which were to emerge some of Michelangelo's finest lyric poems, overflowing with admiration and devotion. She died at the age of 56 and Michelangelo was deeply affected by her death writing many commemorative pieces in her honor. Michelangelo worked until his death in 1564 at the age of 88. He caught a fever and a few days later he passed away. Michelangelo's revolutionizing artistic techniques altered the artist's method for centuries, and still effect how art is made today. His view on the world and its leaders changed the way artists portray their subjects and how bold they allowed their artwork to be. Michelangelo will always be known as one of the most influential artists the world has ever known. ttp://en. wikipedia. org/wiki/Michelangelo www. sparknotes. com Several hypotheses have been put forward about the meaning of The Creation of Adam's highly original composition, many of them taking Michelangelo's well-documented expertise in human anatomy as their starting point. In 1990, an Anderson, Indiana physician named Frank Lynn Meshberger, M. D. noted in the medical publication the Journal of the American Medical Association that the background figures and shapes portrayed behind the figure of God appeared to be an anatomically accurate picture of the human brain. 5] Dr. Meshberger's interpretation has been discussed by Dr. Mark Lee Appler. [6] On close examination, borders in the painting correlate with major sulci of the cerebrum in the inner and outer surface of the brain, the brain stem, the frontal lobe, the basilar artery, the pituitary gland and the optic chiasm. [5] Alternatively, it has been observed that the red cloth around God has the shape of a human uterus (one art historian has called it a â€Å"uterine mantle†[7]), and that the scarf hanging out, colored green, could be a newly cut umbilical cord. 8] â€Å"This is an interesting hypothesis that presents the Creation scene as an idealized representation of the physical birth of man. It explains the navel that appears on Adam, which is at first perplexing because he was created, not born of a woman. â€Å"[9] Michelangelo was both highly literate and plain-spoken. He felt passionate toward individuals, both female and male (Vitoria Colonna and Tommasco Cavalieri in particular. Platonic love suited Michelangelo because the demands of his profession came first. Vittoria, who was independent and highly intelligent, was inaccessible. She was the woman who came closest to being his intellectual equal, and a person characterized by loftiness, nobility and virtue–all of which appealed to the poet. He turned to her for guidance and idealized her through the ecstasy of his religious mindset; Michelangelo was a deeply religious person who believed in prayer and all the accompanying Renaissance religious imagery characteristic of his era. She was a widow and friend to Michelangelo in his later maturity. She died at the age of 56 and Michelangelo was deeply affected by her death writing many commemorative pieces in her honor.

Using Essay Topics for 8th Grade Students

Using Essay Topics for 8th Grade Students Essays are not difficult to writethey all follow the very same structurewhich I will demonstrate in a minute. Like any typical tenth grader, they want to get good grades and want to write excellent georgetown law opics cover letter 10 essays. Argumentative essay is about arguing and debating on a subject, which is debatable. Writing a great essay might be a bit of cake if you are feeling inspired. When it has to do with the middle school, the argumentative essay incorporates moderate topics. Without an essay outline, it would be tough to recall the necessary sections, arguments, logical stream of essay, and general structure. It is a good idea to steer clear of argument essay topics on moral issues because they don't support logical discussion. Recent argumentative essay topics that are related to society is going to do. An 8th grader should learn to research, he or she should practice writing thesis statements, the outline procedure should be mastered, he or she should understand how to compose a rough draft, and in text citations want to get mastered. Obviously, we cannot make you trust us, but we can guarantee that we won't disappoint you. Writing is among the most effective modes of self-expression, and it's also a really effective approach to help your students sort out all their ideas and feelings. In eighth grade, students utilize every phase of the writing procedure and continue to construct their understanding of writing conventions. The students are going to learn how to revise and enhance their writing using guidance from peers. Therefore, many students and employees decide to get low-cost essay rather than writing it themselves. If you still find it difficult to work on your expository essay, speak to our on-line writing team made from professional writers with at least 10 decades of experience to acquire your own personal academic lifebuoy! You are going to be surrounded by writing professionals throughout the plan of order placement, and once you choose to purchase essay and pick an allocated writer, things are likely to get even more exciting. In narrative essays, the author writes about a set of even ts that had happened previously. Our life is about words. The cost of an essay depends upon the quantity of effort the writer has to exert. Actually, prior to making an order you may find a price quote on your essay. The important point to keep in mind is these expository essays are based on facts as opposed to the writer's beliefs or feelings. An expository essay is a part of academic writing aimed to supply explanations of various things. As a result of sexual content issues within this movie, it's challenging to give it a blanket recommendation. You've invited your two best friends to devote the afternoon at your residence. So I went online to watch a whole lot of videos of young individuals speaking about themselves. The issue is we speak various languages not only regarding ethnic groups but regarding the way every individual sees the world. Citations and extracts from assorted sources have to be formatted properly. So make sure you select a subject, which has values in it. If you are fortunate enough to land the proper sit e, you will surely find several topics that are worth note. Well, since there will nonetheless be some grade-specific details. Middle school might be a wretched time for everybody, but most of us were fortunate enough to endure it without the extra humiliations of social networking, much less the temptations of sexting and internet porn. Then you can obtain a class tea-party, dinner party, or another sort of gathering to give students a chance to interact as their unique characters. Besides having the capability to discuss a number of these topics, it's also critical to make sure we can teach these compact kids how to think of a suitable topic for their work. If you don't feel as if you have enough time to compose essays all on your own, we will give you a hand, any instance of the day, seven days per week. The Nuiances of Essay Topics for 8th Grade Students Consider what you could do in order to make your school more beautiful. 8th grade students must be carefully nurtured so they find themselves in a handy place to water their potential. Naturally, we will begin with 8th grade. So be certain that you check grade out, too!

Monasticism And Intellectual L Essay example - 799 Words

Religious and intellectual institutions underwent significant changes throughout the middle ages. In some cases, advances were made, and in others, there was a major decline. Through all of these times, the people of the middle ages learned what didn’t work, what did, and how to progress once they found what did work. nbsp;nbsp;nbsp;nbsp;nbsp;The true form of monasticism in the western Christian church was founded by Saint Benedict of Nursia. He wrote the famous quot;Benedict’s Rulequot; between 520-530. The fundamentals of the rule was that each day was divided into a series of activities with an emphasis on prayer and manual labor. The monks would all gather together seven times each day for prayer. These were all male†¦show more content†¦These were schools attached to cathedrals where religious and secular men could be trained. By the thirteenth century, there were different religious orders among the monasteries. Two main orders were the Franciscans and the Dominicans. The Franciscan order was founded by Saint Francis. They took vows of poverty and lived among the poor. They preached repentance and aided the poor. This order was attractive to many people who were disgusted with the opulent lifestyles many other religious societies lived. The Dominicans were founded by Saint Do minic. This order was made up of mendicant, or begging friars. These were learned men who wanted to protect the teachings of the church from heresy. The Dominicans established schools and also had a representative government for themselves. These were both all male orders, but new establishments for women, called Beguines, were also developed in the thirteenth century. These were poor women who were devout Christians and dedicated to prayer. They lived together and supported themselves by begging and working menial jobs. They took no religious vows, however, and were free to leave as they pleased. They were accepted by the church until the fourteenth century. A religious order that was not accepted by the church were the Waldensians. This order was founded by Peter Waldo in southern France. Waldo was very similar to Saint Francis in his beliefs. He preached the